A new study has concluded that excessive computer gaming has the hall marks of a drug addiction. The research was carried out on 15 men in their 20's.

In one test they were shown "neutral images" and still-frames from games. The men all showed "classic signs of cravings" when the still-frames were shown. In another test, their eye muscles were monitored in a "startle test".

In the second test, Scientists found that the men could not be startled as easily as "normal people". The Scientists concluded that the men showed similar signs to addictions, and the source compares gaming with crack addiction.